MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY
Volcanic tuff. Tuff is a rock formed by the consolidation of volcanic ash. This sample is from the Paisaje Lunar Negro, Canadas, Tenerife, the Canary Islands. The spectacular desolate moon-like landscape of the Canadas caldera contains areas of both black and white tuff. See E417/342 for the white tuff.
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